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PMC 3847746

When administering the injection in the thigh, it's important to locate the correct spot

Compounded methylcobalamin injections may be prescribed by a licensed healthcare provider for patients with clinically appropriate vitamin B12 deficiency or when injectable vitamin B12 supplementation is considered medically appropriate

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It is found mostly in animal products, and absorption from food requires intrinsic factor produced in the stomach

Allergy to vitamin B12 The cases above shouldnt scare you